67 、 This is the minimum concentration of flammable vapors in air below which propagation of flame does not occur on contact with a source of ignition. 这是空气中可燃蒸汽的最低浓度,低于此浓度时,与火源接触时火焰不会传播。
ignition source, the fire would not come out.
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相关题目
1131.安装天线时,对齐箭头必须朝前。
1130. A value of 2 mm is permitted.
1129. All text shall be prepared in one or two columns with justification at the discretion of the manufacturer, however, two columns are preferred for ease of reading.
1128. If desired, the manufacturer may include more than one airplane model in the Maintenance Manual.
1127.涡轮通过减速齿轮转动,向高压轴施加扭矩,从而驱动发动机和飞机附件。
1126. Note is an operating procedure,I inspection, repair or maintenance condition, etc , which is deemed essential to highlight.
1125. Reinforcement plates make the lap joints stronger.
1124. Center of gravity is the point at which an airplane would balance if suspended .Its distance from the reference datum is: found by dividing the total moment by the total weight of the airplane.
1123.语音记录器组件的外壳具有以下特性:防水、 耐冲击和耐热。
1122. The aircraft and engine manufacturers recommend that you do not weld engine components when the engine is installed on the airframe.
